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<?php
/**
 * @link https://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license https://www.yiiframework.com/license/
 */

namespace yii\console\controllers;

use Yii;
use yii\console\Controller;
use yii\helpers\Console;

/**
 * Runs PHP built-in web server.
 *
 * In order to access server from remote machines use 0.0.0.0:8000. That is especially useful when running server in
 * a virtual machine.
 *
 * @author Alexander Makarov <sam@rmcreative.ru>
 * @since 2.0.7
 */
class ServeController extends Controller
{
    const EXIT_CODE_NO_DOCUMENT_ROOT = 2;
    const EXIT_CODE_NO_ROUTING_FILE = 3;
    const EXIT_CODE_ADDRESS_TAKEN_BY_ANOTHER_SERVER = 4;
    const EXIT_CODE_ADDRESS_TAKEN_BY_ANOTHER_PROCESS = 5;

/**
     * @var int port to serve on.
     */
    public $port = 8080;
    /**
     * @var string path or [path alias](guide:concept-aliases) to directory to serve
     */
    public $docroot = '@app/web';
    /**
     * @var string path or [path alias](guide:concept-aliases) to router script.
     * See https://www.php.net/manual/en/features.commandline.webserver.php
     */
    public $router;

/**
     * Runs PHP built-in web server.
     *
     * @param string $address address to serve on. Either "host" or "host:port".
     *
     * @return int
     */
    public function actionIndex($address = 'localhost')
    {
        $documentRoot = Yii::getAlias($this->docroot);
        $router = $this->router !== null ? Yii::getAlias($this->router) : null;

if (strpos($address, ':') === false) {
            $address = $address . ':' . $this->port;
        }

if (!is_dir($documentRoot)) {
            $this->stdout("Document root \"$documentRoot\" does not exist.\n", Console::FG_RED);
            return self::EXIT_CODE_NO_DOCUMENT_ROOT;
        }

if ($this->isAddressTaken($address)) {
            $this->stdout("http://$address is taken by another process.\n", Console::FG_RED);
            return self::EXIT_CODE_ADDRESS_TAKEN_BY_ANOTHER_PROCESS;
        }

if ($this->router !== null && !file_exists($router)) {
            $this->stdout("Routing file \"$router\" does not exist.\n", Console::FG_RED);
            return self::EXIT_CODE_NO_ROUTING_FILE;
        }

$this->stdout("Server started on http://{$address}/\n");
        $this->stdout("Document root is \"{$documentRoot}\"\n");
        if ($this->router) {
            $this->stdout("Routing file is \"$router\"\n");
        }
        $this->stdout("Quit the server with CTRL-C or COMMAND-C.\n");

passthru('"' . PHP_BINARY . '"' . " -S {$address} -t \"{$documentRoot}\" $router");
    }

/**
     * {@inheritdoc}
     */
    public function options($actionID)
    {
        return array_merge(parent::options($actionID), [
            'docroot',
            'router',
            'port',
        ]);
    }

/**
     * {@inheritdoc}
     * @since 2.0.8
     */
    public function optionAliases()
    {
        return array_merge(parent::optionAliases(), [
            't' => 'docroot',
            'p' => 'port',
            'r' => 'router',
        ]);
    }

/**
     * @param string $address server address
     * @return bool if address is already in use
     */
    protected function isAddressTaken($address)
    {
        list($hostname, $port) = explode(':', $address);
        $fp = @fsockopen($hostname, $port, $errno, $errstr, 3);
        if ($fp === false) {
            return false;
        }
        fclose($fp);
        return true;
    }
}